Key-lock



E; 0. BENNETT.

KEY LOCK.

APPLICATION FILED APR. 14, 1919.

Patented June 21, 1921.

INVENTOR Edward 056mm; BY

am i IILILIHI A TTORNE Y WITNESS UNITED STATES PATENT OFFICE.

EDWARD O. BENNETT, OF BERKELEY, CALIFORNIA, ASSIGNOR F FIFTY PER CENT.

TO HEPBURN RUHL, OF CHICAGO, ILLINOIS.

KEY-LOOK.

To'aZZ whom it may concern i Be it known that I, EDWARD, O. BENNETI,

a citizen of the United States, and a resident of the city of Berkeley, county of Alameda, State of California, have made a new and useful inventionto wit, Improvements in Key-Locks; and I do hereby declare the following to be a full, clear, concise, and exact description of the same.

The invention relates particularly to locks commonly known as tumbler locks wherein alrey engages the tumblers moving the same to effect a locking or unlocking operation.

This invention also relates to a new form of key.

"One of the objects of the invention is to produce a lock which can not be easily picked and one which is strong in construction and capable of a large variation of tumbler combinations.

Another object is to produce a lock which may be stamped from sheet metal thereby decreasing the cost of manufacture by reducing the cuttingor millingoperations to a minimum.

The present embodiment of this invention illustrates its application to the construction of cylinder or barrel type locks, the outstanding advantage of which is the total elimination of springs and gravity operated parts,.all of the parts operated by the key positively engaging the same, compelling the tumblers .to positively arrange themselves in accordance with the deviations in the key members; yet of such construction y and arrangement that the key may be insorted and withdrawn with a minimum amount of resistance and wear. and tear upon the parts.

In this specification and the annexed drawings, the invention is illustrated in the form considered to be the best, but it is to be understood that the invention is not limited to such form, because it may be embodied in other forms, and it is also to be understood that in and by the claims following the description, it is desired to cover the invention in whatsoever form it may be embodied.

In the accompanying sheets of drawingszi re 1 discloses a cross section of a comp ete lock and door bolt with the casing of my lock attached thereto.

Specification of Letters Patent. Patented June 21, 1921. Application filed April 14, 1919. Serial No. 289,848. I

Fig. 2 is an end elevation of Fig. 1 taken in the direction of the arrow A.

Fig. 3 is a plan view of Fig. 1 taken in the direction of'the arrow B.

Fig. 4 is an end elevation of the .lock casing.

Fig. 5 is a detail view of my casing lining.

Fig. 6 is a plan View of the same.

Figs. 7 and 8 are detail views of the cylinder sections of my invention.

Figs. 9 and 10 are detail views of my latch operating mechanism.

k Fig. 11 is a plan view of my improved Fig. 12 is a section taken on the line A-B of Fig. 11.

Fig. 13 is a section of fore cutting.

Figs. 14, 15 and 16 are detail views of the tumblers used within my improved lock.

Figs. 17 and 18 are detail views of a retainer.

The numeral 5 designates the casing adapted to contain the various parts of my assembled look. This casing is preferably mounted against or particularly within the latch mechanism which is to be operated by my lock. The case of this mechanism is designated by the numeral 6 and the bolt thereof by the numeral 7.

This casing 5 has an inturned flange 8 at one end thereof. I mount within the casing 5 a shell 9 shown in Figs. 5 and 6. This shell maybe fastened within the casing in any suitable manner. The same is preferably formed of stamped sheet metal and in two sections, said sections having U shaped portions '10 and 11 carried by each section. These U shaped portions project outwardly from the general circular contour, and when placed together form opposing grooves 12 and 13. the purpose of which will be hereinafter described.

Mounted within the forward portion of the casing 5 is a retainer 14 which retainer is circular in form and may be fastened to the casing in any convenient manner, as by lugs 15. This member 14 has an inturned flange 16, which corresponds to the flange 8 of the casing 5. a

The parts 17 of this member 14 pass between the casing 5 and the shell 9, and prevent rotation thereof by means of the shoulmy key blank beders 18 coming in contact with the shoulders 'as the keyhole 27 and adapted to therewith. Upon one face of this member I provide a lug 30 which lug engages the the casi on, the purpose of which will be hereinafter disclosed. The segments above referred to are also slotted longitudinally, as shown by dotted lines in Figs. 7 and 8. One of said segments is provided with a shoulder shown at 26 Fig. 8. This results in a slotted opening extending throughout the length of the segments which when placed together form the lzreyhole of the shape disclosed in Fig. 3 at 2 "Mounted within the member 14 and adapted to rotate thereon is a member 28 having a slotted opening 29 thereon of the same shape be alined bolt 7 and imparts movement thereto, throu h engagement with a slot formed in the b0 t or by contacting with one end thereof depending upon whether the bolt is of the spring type or. merely a sliding bolt. ssuming now that it is desired. to assemble the lock, the following operation is performed Tumblers 24 are placed in the segment members, and a key 31 having a cross section 32 is cut as shown at 33 and 34. The contour of the slots 33 and 34 may be of any desired shape, or may follow apattern depending upon the results desired. The sections of the c linder are placed together with the tumbl ers therein and the key inserted. As the offset portions 25 of the tumblers 24 rise within the slots 33 and 34, the ends of said tumblers will take various positions and extend to a point beyond the periphery of said segments. These ends are then Efiled or cut away in any suitable manner.

The segments forming the cylinder with the tumblers thereon are then placed within 5 .in which'has already been mounted t e shell member 9. The cylinder is so located that the ends of the tumblers will be in a line with the grooves 12 and 13 The member 14 is now forced within the shell and the lugs 15 will spring into the orifices adapted to retain the same, the parts 17 extending between the shell 9 and the cisin 5, thereby preventing rotation there- 0 member 14 and between the ange 16- and arried in the cylindrical portion of the with the slot formed by. the longitudinal grooves in the segments.

N ow, by inserting my key in the opening the tumblers contained within the segments will be moved backward and forward depending upon the curvature of the key slots 33 and 34, and when the key has been forced entirely within the lock the tumblers will all be within the line of the periphery of the segments, and the forward end of the key will have engagement within the member 28, at which time, the cylinder and the member 28 may be rotated, thusimparting movement to the bolt 7 through the lug 30. The key can only be withdrawn when'the cylinder has been again turned so that the tumblers are in alinement with the slots 12 and 13. Upon withdrawing the key, the

contours of thecurves 33 and 34 will again act upon the projection 25 of the tumblers 24 and force them out of the segments so I I claim as new and desire to secure by Letters Patent is a 1. In a lock the combination of a casing; a shell within said casing; a cylinder within said shell and separable into companion segments on a line parallel with its axis; intermeshing grooves and projections on each of the companion segments for maintaining the cylinder in operative position; shell engaging means carried within the grooves and a key for moving said shell engaging means to and from engagement with the shell.

2. In a lock, the combination of a casing, a flange on said casing, a shell mounted within said casing, said shell having oflset U shaped portions, a retainer adapted to fit within said casin said retainer having aflange, and portions lying between said shell and said casing.

3. In a lock, the combination of a casing, a flange on said casing, a shell mounted within said casing, said shell having offset U shaped portions, withinsaid casing, said retainer having a flange, portions lying between said shell and said casing, segments forming a cylinder, a longitudinal slot within said cylinder, horizontal slots within said cylinder, tumblers mounted within said horizontal slots and a retainer adapted to fit 4. In a device of the character described, the combination of a bolt mechanism; a casing mounted upon said bolt mechanism and adapted to cooperate therewith; segments forming a cylinder; intermeshing grooves and projections on the companion faces of each of the cylinder segments for maintaining the cylinder in operative position; tumblers carried by said cylinder and having projections thereon and a key adapted to engage said tumbler projections and impart movement to 'said tumblers.

5. In a device of the character described, the combination of a bolt mechanism; a casing mounted upon said bolt mechanism; a shell within the casing; diametrically opposed longitudinal depressions in said shell; a rotatable member within said shell; a slot in said rotatable member; a lug integral with said. rotatable member and adapted to operate said bolt mechanism; segments, forming a cylinder, rotatably mounted within said casing; a longitudinal slot within said cylinder registering with said slot in the rotatable member; intermeshing, transverse grooves and projections on the companion faces of each of the segments; tumblers slidably mounted in said transverse grooves and adapted to engage said longitudinal depressions; projections formed on said tumblers and extending into said longitudinal slot; a key adapted to enter said longitudinal slot in said cylinder and said rotatable member and grooves formed in the opposite sides of said key and adapted to receive said tumbler projections for imparting motion to said tumblers.

6. In a lock the combination of a casing; a shell within said casing; a lock operatively connected to said shell; longitudinal depressions on opposite sides of said shell; segments forming a cylinder within said shell; intermeshing, transverse grooves and projections on the companion faces of said segments; tumblers slidably mounted within a my hand at said transverse grooves and a key 'for moving said tumblers to and from engagement with the shell longitudinal depressions.

7. In a lock mechanism the combination of an inclosing casing; a lock boltslidable within said casing; a rotatable member mounted wthin said casing having depressions therein and operatively connected to said lock bolt; Ineansfor retaining the rotatable member within the casing; a separable cylinder, rotatably mounted in said casing and provided with transverse openings, in axial alinement with the depressions in said rotatable member; a longitudinal slot within said cylinder; tumblers slidably mounted within said transverse openings and having projections thereon extending into said longitudinal slot and a grooved key adapted to enter said slot and engage said projections and move said tumblers into and from engagement with the depressions in said rotatable member. 7

8. In a lock mechanism'the combinationof an inclosing casing; a lock-bolt slidable within said casing; a rotatable member mounted within said casing and o eratively connected to said lock-bolt; means or retaining the rotatable member in the casing; a shell in said casing having depressions therein; a cylinder, rotatably mounted in said shell, and provided with transverse openings; tumblers slidably mounted therein and having integral projections formed thereon and a grooved key for engaging said, projections and moving said tumblers into and from engagement with the depressions in said shell.

In testimon whereof, I have hereunto set an Francisco, California, this 17th day of March, 1919.

EDWARD O, BENNETT. 

